Question: When is {twinned administrative body} of {Fuzhou} where {start time} is {1981-5-20} ?
Paraphrase: Did Fuzhou become a twinned administrative body on May 20th, 1981?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q68481 p:P190 ?s . ?s ps:P190 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1981')) }